diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 5074752..4ae6383 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -21,4 +21,7 @@ jobs:
         run: npm run lint
 
       - name: Test
-        run: npm test
+        run: npm test -- --coverage-report=json
+
+      - name: Coverage
+        uses: codecov/codecov-action@v1
diff --git a/.gitignore b/.gitignore
index 809b393..25e8bbd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 .nyc_output
+coverage
 node_modules
 npm-debug.log
diff --git a/.prettierignore b/.prettierignore
index b56c82c..bf0acc4 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -1 +1,3 @@
+.nyc_output
+coverage
 tap-snapshots